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Improved KML parser

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This commit is contained in:
Martin Tůma 2016-10-25 22:50:11 +02:00
parent 6cc22afcdc
commit 721ee2aaa9
2 changed files with 110 additions and 22 deletions
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123
src/kmlparser.cpp
View File

@ -13,8 +13,12 @@ bool KMLParser::pointCoordinates()
sp = data.constData();
ep = sp + data.size();
for (cp = sp, vp = sp; cp <= ep; cp++) {
if (*cp == ',' || cp->isNull()) {
for (cp = sp; cp < ep; cp++)
if (!cp->isSpace())
break;
for (vp = cp; cp <= ep; cp++) {
if (*cp == ',') {
if (c > 2)
return false;
@ -34,6 +38,26 @@ bool KMLParser::pointCoordinates()
c++;
vp = cp + 1;
} else if (cp->isSpace() || cp->isNull()) {
if (c < 1)
return false;
#if QT_VERSION < QT_VERSION_CHECK(5, 0, 0)
val[c] = QString(vp, cp - vp).toDouble(&res);
#else // QT_VERSION < 5
val[c] = QStringRef(&data, vp - sp, cp - vp).toDouble(&res);
#endif // QT_VERSION < 5
if (!res)
return false;
Waypoint w(Coordinates(val[0], val[1]));
if (c == 2)
w.setElevation(val[2]);
_waypoints.append(w);
while (cp->isSpace())
cp++;
c = 3;
}
}
@ -52,8 +76,12 @@ bool KMLParser::lineCoordinates()
sp = data.constData();
ep = sp + data.size();
for (cp = sp, vp = sp; cp <= ep; cp++) {
if (*cp == ',' || cp->isSpace() || cp->isNull()) {
for (cp = sp; cp < ep; cp++)
if (!cp->isSpace())
break;
for (vp = cp; cp <= ep; cp++) {
if (*cp == ',') {
if (c > 2)
return false;
@ -65,25 +93,48 @@ bool KMLParser::lineCoordinates()
if (!res)
return false;
if (c == 2) {
Waypoint w(Coordinates(val[0], val[1]));
w.setElevation(val[2]);
_route->append(w);
}
c++;
vp = cp + 1;
}
if (cp->isSpace()) {
if (c < 3)
} else if (cp->isSpace() || cp->isNull()) {
if (c < 1 || c > 2)
return false;
#if QT_VERSION < QT_VERSION_CHECK(5, 0, 0)
val[c] = QString(vp, cp - vp).toDouble(&res);
#else // QT_VERSION < 5
val[c] = QStringRef(&data, vp - sp, cp - vp).toDouble(&res);
#endif // QT_VERSION < 5
if (!res)
return false;
Waypoint w(Coordinates(val[0], val[1]));
if (c == 2)
w.setElevation(val[2]);
_route->append(w);
while (cp->isSpace())
cp++;
c = 0;
vp = cp;
}
}
return true;
return true;
}
QDateTime KMLParser::timeStamp()
{
QDateTime date;
while (_reader.readNextStartElement()) {
if (_reader.name() == "when") {
date = QDateTime::fromString(_reader.readElementText(),
Qt::ISODate);
} else
_reader.skipCurrentElement();
}
return date;
}
void KMLParser::lineString()
@ -99,22 +150,33 @@ void KMLParser::lineString()
}
}
void KMLParser::point()
void KMLParser::point(const QString &name, const QString &desc,
const QDateTime timestamp)
{
while (_reader.readNextStartElement()) {
if (_reader.name() == "coordinates") {
if (!pointCoordinates())
_reader.raiseError("Invalid coordinates.");
else {
Waypoint &w = _waypoints.last();
if (!name.isNull())
w.setName(name);
if (!desc.isNull())
w.setDescription(desc);
if (!timestamp.isNull())
w.setTimestamp(timestamp);
}
} else
_reader.skipCurrentElement();
}
}
void KMLParser::multiGeometry()
void KMLParser::multiGeometry(const QString &name, const QString &desc,
const QDateTime timestamp)
{
while (_reader.readNextStartElement()) {
if (_reader.name() == "Point")
point();
point(name, desc, timestamp);
else if (_reader.name() == "LineString")
lineString();
else
@ -124,13 +186,32 @@ void KMLParser::multiGeometry()
void KMLParser::placemark()
{
QString name, desc;
QDateTime date;
while (_reader.readNextStartElement()) {
if (_reader.name() == "Point")
point();
if (_reader.name() == "name")
name = _reader.readElementText();
else if (_reader.name() == "description")
desc = _reader.readElementText();
else if (_reader.name() == "TimeStamp")
date = timeStamp();
else if (_reader.name() == "Point")
point(name, desc, date);
else if (_reader.name() == "LineString")
lineString();
else if (_reader.name() == "MultiGeometry")
multiGeometry();
multiGeometry(name, desc, date);
else
_reader.skipCurrentElement();
}
}
void KMLParser::folder()
{
while (_reader.readNextStartElement()) {
if (_reader.name() == "Placemark")
placemark();
else
_reader.skipCurrentElement();
}
@ -141,6 +222,8 @@ void KMLParser::document()
while (_reader.readNextStartElement()) {
if (_reader.name() == "Placemark")
placemark();
else if (_reader.name() == "Folder")
folder();
else
_reader.skipCurrentElement();
}

9
src/kmlparser.h
View File

@ -3,6 +3,7 @@
#include <QXmlStreamReader>
#include <QVector>
#include <QDateTime>
#include "parser.h"
class KMLParser : public Parser
@ -22,12 +23,16 @@ private:
bool parse();
void kml();
void document();
void folder();
void placemark();
void multiGeometry();
void multiGeometry(const QString &name, const QString &desc,
const QDateTime timestamp);
void lineString();
void point();
void point(const QString &name, const QString &desc,
const QDateTime timestamp);
bool pointCoordinates();
bool lineCoordinates();
QDateTime timeStamp();
QXmlStreamReader _reader;
QVector<Trackpoint> *_track;